Meet the world's first actual computer bug

Back in 2012, the last leap second brought big sites like Reddit, Yelp, and LinkedIn, but this time out, everything was smooth sailing — no leap second bug in sight.

Still, even though we made it through this time, that 2012 incident wasn't the first major bug, and it won't be the last.

Flash back to 1944, when this whole "computer" thing was pretty new.

Harvard computer scientists working on the Mark I electromechanical computer — the early supercomputer that helped Manhattan Project scientists simulate the effects of an atomic bomb — had started to call errors in their software "bugs."